Effect of multiscale structure on the gas barrier properties of poly(lactic acid)/Ag nanocomposite films

Fan, Cunzheng; Chi, Hai; Zhang, Cheng; Cui, Rui; Lu, Wangwei; Yuan, Minglong; Qin, Yuyue

doi:10.1002/pat.4601

Cited by 15 publications

(10 citation statements)

References 33 publications

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“…The PLA/1.5%-SeMP composite membrane showed the lowest WVP of 3.55 × 10 −14 g·cm/cm 2 ·s·Pa, which is 30.6% lower than that of the pure PLA. This may be due to the SeMPs entering the pores of the PLA molecular chain, resulting in the formation of a tortuous diffusion channel for the water vapor molecules in the polymer matrix [64]. This is like results obtained previously.…”

Section: Water Vapor Permeabilitysupporting

confidence: 77%

Development of Polylactic Acid Films with Selenium Microparticles and Its Application for Food Packaging

et al. 2020

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Selenium is a natural element which exists in the human body and plays an important role in metabolism. Along with this, selenium also possesses antibacterial and antioxidant properties. Using selenium microparticles (SeMPs) in food packaging films is exceptional. In this experiment, a solution casting method was used to make film. For this purpose, we used polylactic acid (PLA) as a substrate for the formation of a film membrane while SeMPs were added with certain ratios to attain antibacterial and antioxidant properties. The effects of SeMPs on the PLA film and the value of SeMPs in food packaging film production were investigated. The effects of the SeMPs contents on the features of the film, such as its mechanical property, solubility, swelling capacity, water vapor permeability, antioxidant activity, and the antibacterial activity of the composite membrane against Staphylococcus aureus (Gram-positive) and Escherichia coli (Gram-negative) strains, were studied. The results manifest that the PLA/SeMPs films showed higher water resistance, UV resistance, antioxidant activity, and antibacterial activity than pure PLA film. When the concentration of SeMPs was 1.5 wt%, the composite membrane showed the best comprehensive performance. Although the tensile strength and elongation at break of the membrane were slightly reduced by the addition of SeMPs, the results show that PLA/SeMPs films are still suitable for food packaging and would be a very promising material for food packaging.An important reason behind the need for food packaging with antibacterial properties is the ever-growing issue of increasing foodborne microorganisms, which necessitates higher requirements for the functionality of food packaging that ensures the retention of the food quality [12]. The PLA membrane has no antimicrobial property. The incorporation of nanomaterials (nano-metals, nano-cellulose, nano-clay and so on) improves the properties and helps to obtain antibacterial activity, prevent ultraviolet radiation and other additional functional properties [13]. In this regard, metal nanoparticles such as those of titanium, silver, and zinc have been found to improve the antimicrobial activity of biodegradable polymer films [14][15][16]. Some studies have shown the successful incorporation of nanoparticles in the PLA films to enhance the properties of films. Athanasoulia et al. [17] made the TiO 2 /PLA membrane by extrusion melt blending and investigated the influence of the incorporation of TiO 2 nano particles on the performance and features of a brittle crystalline poly-matrix. They found that a 20/80 w/w TiO 2 /PLA nanocomposite offered favorable bacteriostatic effects both under UV light and in the dark. Shebi et al. [18] prepared the honeycomb membrane by using the breath figure method. This study explained that the nanomaterials (H-PLA/GST) showed obvious bacteriostatic properties to S. aureus, both in visible light and in dark conditions. Munteanu et al. [19] used the electrostatic spinning method to mix polylactic acid (PLA), silver ...

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Section: Water Vapor Permeabilitysupporting

confidence: 77%

Development of Polylactic Acid Films with Selenium Microparticles and Its Application for Food Packaging

et al. 2020

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“…Nitrogen gas was passed into the upper half of the sample chamber where an oxygen sensor was placed. Pure oxygen with purity up to 99.99% was passed into the lower half 25 . Each sample was tested three times.…”

Section: Methodsmentioning

confidence: 99%

“…WVP of the film was determined gravimetrically according to ASTM E96 standard method as described in a previous work 25 . A weighing bottle containing 12 g of anhydrous silica gel was sealed with the test film and placed in a desiccator with saturated sodium chloride solution at the bottom.…”

Section: Methodsmentioning

confidence: 99%

Effect of ultrahigh‐pressure treatment on the functional properties of poly(lactic acid)/ZnO nanocomposite food packaging film

et al. 2021

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BACKGROUND Our living environment is being increasingly polluted by petroleum‐based plastics and there is an increasing demand for biodegradable food packaging. In this study, the effect of various ultrahigh‐pressure (UHP) treatments (0, 200 and 400 MPa) on the microstructure and thermal, barrier and mechanical properties of poly(lactic acid) (PLA)/ZnO nanocomposite films was studied. RESULTS The film‐forming solution was processed using UHP technology. The crystallinity, strength and stiffness of the composite film after UHP treatment increased. In addition, barrier property analysis showed that the UHP treatment significantly (P < 0.05) reduced the oxygen permeability and water vapor permeability (WVP) coefficient of the PLA/ZnO nanocomposite film. Furthermore, the WVP value of the film treated at 400 MPa (50 g kg−1 nano‐ZnO content) was the lowest and reduced by 47.3% compared with that of pure PLA film. The improvement in these properties might be due to the interaction between nano‐ZnO and PLA matrix promoted by UHP treatment. CONCLUSIONS Therefore, the application of UHP technology on the film‐forming solution could improve the crystallinity and functional properties of the nanocomposite film, and has great potential in the production of food packaging films with ideal functions. © 2021 Society of Chemical Industry

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“…Some metal oxide nanoparticles, such as CuO [ 41 ] and ZnO [ 42 ] also exhibit strong antimicrobial activities that are comparable to that of AgNPs. The solid core of these spherical nanoparticles is impermeable so the transport of molecules across the structure has not been reported [ 43 , 44 ]. The surface hydrophilicity of these nanoparticles is one of the main reasons that makes them favorably used in the preparation of liquid-separation membranes.…”

Section: Dimension Plays Its Role: An Overviewmentioning

confidence: 99%

Nanocomposite Membranes for Liquid and Gas Separations from the Perspective of Nanostructure Dimensions

2020

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One of the critical aspects in the design of nanocomposite membrane is the selection of a well-matched pair of nanomaterials and a polymer matrix that suits their intended application. By making use of the fascinating flexibility of nanoscale materials, the functionalities of the resultant nanocomposite membranes can be tailored. The unique features demonstrated by nanomaterials are closely related to their dimensions, hence a greater attention is deserved for this critical aspect. Recognizing the impressive research efforts devoted to fine-tuning the nanocomposite membranes for a broad range of applications including gas and liquid separation, this review intends to discuss the selection criteria of nanostructured materials from the perspective of their dimensions for the production of high-performing nanocomposite membranes. Based on their dimension classifications, an overview of the characteristics of nanomaterials used for the development of nanocomposite membranes is presented. The advantages and roles of these nanomaterials in advancing the performance of the resultant nanocomposite membranes for gas and liquid separation are reviewed. By highlighting the importance of dimensions of nanomaterials that account for their intriguing structural and physical properties, the potential of these nanomaterials in the development of nanocomposite membranes can be fully harnessed.

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Effect of multiscale structure on the gas barrier properties of poly(lactic acid)/Ag nanocomposite films

Cited by 15 publications

References 33 publications

Development of Polylactic Acid Films with Selenium Microparticles and Its Application for Food Packaging

Development of Polylactic Acid Films with Selenium Microparticles and Its Application for Food Packaging

Effect of ultrahigh‐pressure treatment on the functional properties of poly(lactic acid)/ZnO nanocomposite food packaging film

Nanocomposite Membranes for Liquid and Gas Separations from the Perspective of Nanostructure Dimensions

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